Progressive Web Apps
https://pwa.xgqfrms.xyz/pwa-app/public/index.html
// API Key
const url = `https://api.darksky.net/forecast/1dda89e902ce89b77ed2412eac3026d7/${coords}`;
https://www.cnblogs.com/xgqfrms/p/11616179.html
Your First Progressive Web App
https://developers.google.com/web/fundamentals/codelabs/your-first-pwapp/?hl=zh-cn
https://codelabs.developers.google.com/codelabs/your-first-pwapp/index.html
https://github.com/googlecodelabs/your-first-pwapp
service-worker
https://googlechrome.github.io/samples/service-worker/basic/index.html
https://github.com/GoogleChrome/samples/tree/gh-pages/service-worker/basic